Carburetor



W. B. PARKER May 5, 1936.

CARBURETOR 4 Sheets-Sheet 1 Filed July 19, 1934 a B. Parker;

W. B. PARKER May 5, 1936.

CARBUHETOR y 9 6 w. a. PARKER 2,040,020

CARBURETOR Filed July 19, 1934 4 Sheets-Sheet 3 May 5, 1936. w B, PARKER2,040,020

CARBUR-ETOR Filed July 19, 1934 4 Sheets-Sheet 4 Patented May 5, 1936UNITED STATES PATENT OFFICE 2,040,020 CARBURETOR My invention relates toimprovements in carburetors for internal combustion engines.

An important object of the invention is to provide a carburetor whichwill effect an economy in the use of fuel.

A further object of the invention is to provide a carburetor which willproduce an improved explosive charge, whereby greater povger isobtained. A further object of the inventiomis to provide 1;) acarburetor so constructed that the automatic vacuum tank or fuel-pump iseliminated and the liquid fuel properly fed to the carburetor.

A further object of the invention is to provide means for supplyingmoisture or water vapor to the explosive charge.

A further object of the invention is to provide a device for use inconnection with a carburetor for supplying moisture or water vapor tothe explosive charge. 39 A further object of the invention is to providea carburetor having means to supply a reduced explosive charge tocylinders of the engine, when are employed to designate like partsthroughout the same,

Figure 1 is a perspective view of a carburetor embodying my invention,

Figure 2 is a longitudinal section taken substantially on line 2--2 ofFigure 1,

Figure 3 is a transverse section taken on line 33 of Figure 1, v Figure4 is a' similar view taken on line 4-4 of Figure 1,

Figure 5 is a longitudinal section taken on line 55 oi Figure 1, l

Figure 5 is a transverse section taken on line 5'-5" of Figure 2. v

a Figure 6 is a, perspective view of the draft actuated element andvalve'operated thereby,

Figure 7 is a perspective view of a carburetor embodying a modified formof the invention, Figure 8 is a similar view of a carburetor em- 16, fora purpose to be described. Mounted withr 5 of this application and inwhich like numerals bodying a still further modified form of theinvention,

Figure 9 is a perspective view of a portion of the carburetor employedin connection with a i separate carburetor for supplying moisture to'thecharge, and, v

, Figure 10 is a plan view of the device shown in Figure 9.

Attention being called first to Figures 1 to 8 inclusive, the numeral l5designates the main l0 casing or pipe, which may be vertically arranged,as the present carburetor'is illustrated as a downdraft carburetor,while the invention is not necessarily restricted to the down-draftfeature. The vertical casing l5 has its upper end open and 1 its lowerend is provided with a coupling flange [6. The numeral l'l designatesthe intake manifold of an internal combustion engine having a couplingflange l8, arranged opposite the flange in the upper portion of the mainair inlet pipe [5 is a throttle valve I9, which turns in the directionof, the arrow, Figure 2, when opening. This throttle valve is mountedupon a transverse shaft 20, extending to the exterior of the casing l5 3and having a lever 2| attached thereto, to turn the shaft. The lever 2|has an adjustable stop element or screw 22, carried thereby, to engagewith a stop lug 23. The stop element 22 may be adjusted so that there isa slight passage between '30 the throttle valve l9 and the inner wall ofthe main air inlet pipe l5, when the throttle valve is in the closedposition. The lever 2| also has an adjustable stop element or screw 24carried thereby, and arranged near its opposite end, and 5 this stopelement or screw engages the same stop lug 23 to limit the openingmovement of the throttle valve I9 so that it does not assume acompletely vertical position when shifted toward such open position, butwill be slightly inclined, 40 as shown by dotted lines in Figure 2,thereby producing a slight choking efiect when shifted to the extremeopen position. The lever 2| is connected with the gas leveror'accelerator in the automobile, as is the common practice. p,

The numeral 25 designates a block constituting the body portion of thecarburetor, and this. block 25 is arranged between the coupling flangesl6 and i8 and is clamped thereto by bolts 26 or the like, with suitablepacking or gaskets 21 between 50 these parts. The block 25 is providedwith a .main vertical opening 28, in substantial alignment with thebores of the pipe [5 and the intake I end of the intake manifold II, asshown. The block 25 is provided, adjacent to the main opensleeve 3|,having transverse ports 32 and 33, which also extend through the shaft30. The sleeve 3| is clamped or locked upon the shaft 30 by a set.

screw 34 or the like. The sleeve 3| and'the portion of the shaft 30 uponwhich it is mounted constitute a pivoted valve body 3|. Rigidly attachedto the sleeve 3| and preferably formed integral therewith, is a draftactuated element or valve 35, which is adapted to substantially coverthe main opening or passage 28 when in the upper or closed position andits free end portion will then engage beneath a shoulder 38. Thefunction of the shoulder is to form a tighter joint with the draftactuated element or valve 35 and to limit its upward movement,particularly against back-firing action.

The block 25 is provided with a longitudinally extending charge supplypart 31, which leads to the valve body 3|. When the valve body is in theclosed position, with the draft actuated element 35 closed, such valvebody covers the outlet end of the port 31, but as the element 35 isswung downwardly and the valve body 3| turned with it, transverse port32 is brought into communication with the port 31, and the mixture ofair and gas will be supplied into the passage 28, above the draftactuated element 35. The port 31 has its rear end portion enlarged, asshown at 38, and this enlarged portion is internally threaded to receivea tubular nipple 39, having a reduced bore 40, to regulate the entranceof air into the port 31. If desired, a nipple 39, having a differentsized bore 48, could be substituted to admit more or less air, as founddesirable. The numeral 4| designates an auxiliary block, the forward endof which is arranged beneath and adjacent to the rear end of the block25 and is provided with a recess or chamber 42. The block 4| is rigidlyattache-i to the block 25 by means of a screw 43, provided with a washer44, and a washer 48 is arranged between the blocks 4| and 25, as shown.The screw 43 has screw-threaded engagement within the opening 41 and theupper end of the screw 43 terminates substantially centrally within theenlarged bore 38. The screw 43 has a portion thereof tubular, which isafforded by a port 48 formed therein, which extends through the upperend of the screw and laterally through the same.

substantially centrally ofthe recess or chamber 42. The rear end ofth'eblock 25 is provided with a screw-threaded boss 49, receiving thescrew-threaded portion 58 of an adjustable needle valve 5|, adapted toproject within the outlet end of the bore 48 of the tubular element orscrew 43, to regulate the amount-of gasoline fedinto the enlarged bore38 and to also atomize or spray the same. The needle valve is heldagainst accidental displacement by means of a coil spring 52,surrounding the same, and engaging a transverse pin 53, as shown.Leading into the recess or chamber 42 is a longitudinal port 54, formedin the block 4|, and the rearend of this longitudinal port leads'into arecessor chamber 55, formed in the block 4| and an upstanding transverseportion-56 thereof. The block 4| is provided upon its lower face andgenerally centrally thereof, with a cylindrical recess 51,.receiving awasher 88, which is engaged by the upper end of a suction bulb orreceptacle 58, preferably formed of glass. is held in place by a ball orU-shaped keeper 68, the upper endsof which are pivoted with the Thissuction bulb or receptacle block 4|, as shown at 8|. A pin 82 is rigidlyattached to the lower closed end of this bail, and this pin isscrew-threaded for receiving a clamping nut 83, acting against a hollowwasher 84, adapted to engage with the bottom of the bulb or receptacle58 and hold the same in place. The recess or chamber 55 is arrangedabove the bulb or receptacle 59 and the bottom of this recess or chamberhas a screw-threaded opening for receiving the upper screw-threaded endof a tube 68, which depends below the block 4| and enters the bulb orreceptacle 58 and preferably terminates near the bottom of the bulb orreceptacle, and should atleast terminate at an elevation beneath theminimum level of the liquid fuel within the bulb or receptacle 58. Atits upper end the tube 88 projects into the recess or chamber 55 and isprovided with a valve seat 61, for engagement with an upwardly openingcheck valve 68, preferably formed of fibrous material, such as cork,fiber or the like, although the same may be formed of metal. This checkvalve is urged downwardly toward its seat by a compressible coil spring69, engagedby'an adjustable screw-threaded plug 18, operating with ascrewthreaded opening 1| and having a washer 12 arranged beneath thesame. The block 4| is further provided with a rear longitudinal port 13,the forward end of which turns downwardly, as

shown at 14, and passes through the bottom wall of the recess 51, andhence leads into the top of the bulb or receptacle 59. The liquid fuel,such as gasoline is supplied to the port 13 through a coupling 15 havingconnection with a pipe (not shown) which leads into the gasoline tank ofthe automobile. In order that my carburetor will not flood, it isnecessary that the carburetor be arranged at an elevation above thegasoline tank. The gasoline is withdrawn from the bulb or receptacle 59by the suction within the intake manifold H, such gasoline passingthrough the port 54, discharging at the needle valve 5| and beingsprayed or atomized at this point and mixed with the air passing throughthe nipple 48 and then passing through the port 31 to the intakemanifold. As the tube 88 has its intake end beneath tacle 59, thisgasoline forms a seal with the tube 88, and as the level of the gasolinedescends, it creates a partial vacuum at the topof the receptacle orbulb 59, drawing in. gasoline from the tank through the port 13. Thevaporized fuel is supplied in the. intake manifold when the engine isspeeded up'beyond idling but is not supplied to the intake manifold whenthe engine is idling, as the valve body 3| then. has its port 32 in theclosed position. Separate means are provided to supply theeharge totheintakemanifold, for driving the engine while idling. The separate meansincludes 9. lug or post 18 having a chamber I1, Figures 2 and 5', whichis in communication with a tube 18, connected with a coupling 19. Thiscoupling 19, Figure 3, is in communication with" a recess 88, having avertical tube 8| leading into its lower end, and this tube 8|extendsinto the bulb or receptacle 59 and has its lower end preferablyterminated at the same elevation as the lower end of the tube 88. Theupper end of the tube 8| within the chamber 88 has a valve seat 82, forengagement with an upwardly opening check valve 83, preferably'fo'rmedof fibrous material, such as cork, fiber, although the same may beformed of metal. This check valve is urged downwardly by a compressiblecoil spring 84 engaging a plug 85, having screw-threaded engagementwithin a screw-threaded opening 86.

The function of the check valves 68 and 83 is to prevent the back flowof air into the bulb or receptacle 59, and hence the breaking of thesuction therein. Thus when the gasoline is being supplied to the intakemanifold for high speed, the check valve 83 prevents back suctionthrough the idling gasoline supply means, and when the gasoline issupplied for idling of the engine, check valve 68 will prevent the backflow of air through the high speed gasoline supplying means. The chamber11, Figure 2, has communication with a' port 81, which leads into themain air supply pipe I5 at a point beneath the throttle valve I9,whereby the charge is supplied to the intake mani-v fold when thethrottle valve is closed and the engine is idling. Air is supplied tothe chamber 71 through a port 88, Figure 5, leading into one end of thechamber TI, and this supply of air is regulated by an adjustable needlevalve 69. The gasoline entering the chamber I1 is sprayed or atomized bypassing through the nozzle 90, and then becomes vaporized and mixed withthe incoming air through the port 88, the gaseous mixture dischargingthrough the port 81. It should be noted that the supply of the idlingcharge is entirely independent of the rotary valve body 3 I Means arealso provided to supply moisture or water vapor to the intake manifold.To accomplish this, the block is provided in its rear porticn with avertical chamber 9|, and a threaded tubular coupling 92 engages withinthe lower end of this chamber and has connection with a pipe 93, whichleads to a water tank, disposed at a level below the chamber 9I toprevent flooding. The tubular coupling 92 is provided at its upper endwith an outlet or valve seat 94 for coaction with an adjustable needleyalve 95, having screwthreaded engagement within a post 96 and extendingto the exterior of the top of the block 25. The needle valve 95 may beemployed to regulate the amount of water supplied into, the chamber 9|,and also to atomize or spray this water, and may be alsovmanipulated tocompletely cutoff the supply of water when desired. Air is supplied intothe rear side of the vertical chamber 9i through a rear longitudinalport 91, and the amount of air may be regulated by a pivoted plate valve98, Figure 1. The air entering the chamber 9| mixes with the atomizedwater and becomes saturated or ladened with the sa e. Have ing cmmunication with the forward side of the chamber 9| is a longitudinalport 99, extending through the block 25 and leading to the passage 28,at a point whereby it may be brought into and out of registration withthe transverse bore 33 of the swinging valve body-3|. When the draftactuated member is in the closed position, the supply of fuel throughthe port 32 and a the supply of moisture through the port 33 are,

both out ofi. I

The description thus far given is common to the three forms ;of theinvention shown in Figures .l to '7 and 8, and also 10.

Attention is now called to Figures 1 to 6 inclusive, showing the firstor preferred form of theinvention. In connection with this first orpreferred formof the invention, means are provided for turning the valvebody 3I This means comprises a cylinder I00, having a pipe IOI leadinginto its upper end, and this pipe leads into the main air supply pipeI5, at a point beneath the throttle valve I9. The cylinder I00 issupported by a bracket I02, which may. be rigidly attached to the flangeI6. Mounted to reciprocate with-v ,tinues during the idling of theengine.

inthe cylinder I00, is a plunger I03, havingpivotal connection with aconnecting rod or pitman I04, the lower end of the cylinder I00 beingopen. The lower end of the connecting rod I04 is pivotally connected atI05 with a lever I06, which is rigidly mounted upon one end of the shaft30. A retractile coil spring I0! is attached to the lever I06, to swingthe same downwardly and the opposite end of this spring is attached to astationary hook or lug I08. A choke lever I09 is pivotally mounted uponthe shaft 30, upon the inner side of the lever I06, and has a laterallyprojecting leaf or extension II 0, arranged to engage above the leverI06 and forwardly of its pivot. A rod III is pivotally connected withthe choke lever I09, and extends to the dash of the automobile or otherconvenient point. When the choke lever I09 is swung rearwardly, it willdepress the lever I06, but the lever I06 may move downwardly withoutshifting the choke lever.

The operation of the first or preferred form of the carburetor is asfollows:

When the engine is not running and is cold,

the throttle valve I9 is closed and the spring I01 5 swings the leverI06 downwardly, and the draft actuated element 95 is in the lower oropened position, since there is no suction in the pipe I5 beneath theclosed throttle valve.- With this adjustment of parts, the port 32 is inregistration mum amount of explosive charge is fed to the intakemanifold upon starting. When the engine is cranked, the vaporized fuelis also drawn into the pipe I5'beneath the throttle valve I9 through theport 01, and this supply of fuel con- When the suction is created in thepipe l5 beneath the throttle valve I9 upon the start of the engine theplunger I03 rises and overcomesthe action of the spring I01 and therebycloses the draft actuated element 35, and the engine may now idle 'uponthe fuel supplied .through the port 81. Should the engine stop afterstarting, it may be necessary to retain the valve body 3| and draftactuated element 35 in the opened DQSition for a shortperiod, to supplyan abundance of fuel to the engine to insure proper running until it haswarmed up sufiiciently. This is accomplished by pulling the chock rodIII rearwardly, which will swing the'choke lever I09 rearwardly anddepress lever I06 and hold this lever depressed until the choke leverI09 is released. The engine being now suitably warmed lip and the chokelever I09 released, plunger I03 and associated elements will return thevalve body 3| and draft actuated element 35 to the closed position, andthe engine will continue -to'idle on the fuel supplied throughthe.'port.81. To speed up the engine, the throttle valve I9 is swung toward the opened position and this will reduce the suction in the pipe I5beneath \the throttle valve body 3I' toward the opened position, inopposition to the suction action upon the top of and 99 and theexplosive charge and moisture drawn into the intake manifold II, in thepresence of the incoming air. As the engine speeds up, the suctionwithin the pipe I5 beneath the throttle valve I9, which is now partly orwholly opened, is transmitted to the top of the plunger I03, and thelifting action of this suction on the plunger I03 is opposed to thedownward force which the draft of air produces by impinging upon thedraft actuated element 35, the draft forcing the element 35 downwardlytoward the complete opened p'ositiomas the velocity of the draftincreases, which is produced by the further opening movement of thethrottle valve. The speed of the motor is controlled by the extent ofopening of the thottle valve I9, and the extent of opening of the draftactuated element 35 is controlled by the speed of the engine whichcreates the draft. When the engine slows down .1 upon the swingingmovement of the throttle valve I9 toward the closed position, thevelocity of the draft of air is reduced, the degree of suction'withinthe pipe I5 beneath the throttle valve increases, and plunger I03 movesupwardly to swing the draft actuated element upwardly, which in turnmoves the valve body 3! toward the closed position, thereby reducing thesupply of the explosive charge and moisture in proportion to the speedof the engine. When the throttle valve I9 isopened to any considerableextent, quickly, the vacuum within the pipe I5 beneath the throttlevalve is at once broken, and the spring I01, before the velocity of thedraft has increased to any considerable extent, will quickly shift thedraft actuated element 35 to the lowermost or opened position. This willsupply the maximum amount of the explosive charge to the'intakemanifold, thus imparting to the engine a quick pick-up. As the degree ofvacuum increases in the pipe I5 beneath the throttle valve I9, it actsupon the top of the plunger I03, tending to elevate the same, which inturn will swing the draft actuated element 35 upwardly, and thisupwardswinging movement is opposed by the velocity of, the downwardlytravelling air draft impinging upon the element 35. These two forcestherefore work in oppos tion, the suction force increasing as thethrottle valve approaches the closed position and the velocity of thedraft decreases and vice versa. It is thus seen that means are providedwhich automatically meters or measures the volume of the explosivecharge supplied to the engine in proportion to the speed of the engine.

In Figure '7, I have shown the'second modified form of the carburetor.In connection with this form of carburetor the cylinder I00, pipe Isl,connecting rod I04 and spring I01 are dispensed with and there is noopening in the pipe I05 for the 'pipe IN. A retractile coil spring H2 isarranged abcve the lever I06 and is connected therewith and may beattached to the shaft of the throttle valve or to any other stationaryobject. The spring II2 serves to swingthe lever I06 upward'y and therebyturn the shaft in a direction to swing the draft actuated elementupwardly. All other parts of the carburetor remain identical with thefirst form of the carburetor. The operation of the second form of thecarburetor is as follows:

With the engine at rest, or cold, the operator draws the choke rod IIIrearwardly, which swings the choke-lever I09 rearwardly and turns sitionand also turns the valve body 3| so that ports 32 and 33 register withports 31 and 99, respectively. .The engine is now cranked and themaximum supply of the charge will be drawn into the cylinders, thethrottle valve I9 remaining closed to afford a rich mixture. As soon asthe engine starts up the choke rod II I is released and the spring I I2will return the draft actuated element 35 and associated elements to theclosed position and the engine will idle upon the charge receivedthrough the pipe I8. As the throttle valve I9 is moved toward theopenedposition the velocity of the down draft of the air through thepipe I5 is increased, this draft impinging upon the element 35 andshifting the same toward the opened position, the extent of openingmovement of the element 35 corresponding to the extent of openingmovement of the throttle valve. As the draft actuated element 35 opens,ports 32 and 33 move into communication with ports 31 and 99, thussupplying the explosive charge to the intake manifold, with the throttlevalve partly or wholly opened. It is thus seen that the draft actuatedelement 35 does not instantaneously drop to the lowermost position whenthe throttle valve'is first partly opened as occurs with the first formof the in vention, and the first form of the invention has the advantageof a quicker pick-up.

In connection with the third form of the carburetor, shown in Figure 8,with relation to the first form of the carburetorfshown in Figure l, thecylinder I00, pipe IOI, connecting link I04 and spring I01, are omitted.The pipe I5 has no opening for the pipe IN. The same lever I06 isr'gidly mounted upon the shaft 30 and the same choke lever I09 isprovided. The shaft 20 of the throttle valve I9, Figure 8, has a leverII3 rigidly secured thereto, and this lever has pivotal connection atH4, with the link H5. The link H5 is provided in its lower end with anelongated slot I I6, receiving a pin II'I, attached to the forward endof the lever I06. The lever I06 is swung upwardly by a retractile coilspring H8,

which may be attached to the pin II! and to the end of the lever II 3 orto any other suitable stationary member or projection. All other partsof the carburetor shown in Figure 8 are identical with the first form ofcarburetor, as shown in Figure l.

The operation of the form of carburetor shown in Figure 8 is as follows:

When the engine is at rest and cold, to start the engine the choke rodII I is moved rearwardly to swing the choke lever I09 rearwardly andthis choke lever then swings lever I06 downwardly, which in turn swingsthe draft actuated element 35 downwardly to the opened positionand'turna the valve body 3| to bring ports 32 and 33 into ing the linkH5 downwardly. When the choke lever,I99 is released, the spring 8 willreturn the draft actuated element 35 and associated elements to theclosed position, and the engine may then idle upon the fuel drawnthrough the pipe I8. 'I'o speed up the engine the throttle valve I9 isshifted toward the opened position, and in order that there may be animmediate supply of fuel to the engine for a quick pick-up, the link H5will now be moved downwardly and the top end wall of the slot H6 willengage the pin III and mechanically shift the lever I06 downwardly,opening element 35 and turning the valve body 3| to the opened position.As soon as the engine speeds up, the velocity of the draft increases,and this draft impinges upon the element 35, swinging the samedownwardly to 'a great extent or maintaining the same in a partly openedposition. The extent of opening of the element 35 will correspond to thespeed of the engine and velocity of the draft, and hence the valve bodywill supply a corresponding increased amount of fuel to the engine asits speed increases. When the throttle valve I9 is again swung towardthe closed-position, the link I I5 rises, and as the velocity of the airimpinging upon the element 35 decreases, the

spring II8 will swing the element 35 and asso- 2 ciated elementsupwardly.

In Figures 9 and 10, I have shown a unit of my carburetor used as a gassaver in connection with a standard type of carburetor. This unitincludes the block 25. The fuel supply port 31 is closed at its twointakes, by a plug i I9, which is substituted for the air jet 40, and asimilar plug is substituted for the tubular element or bolt 43 andcloses the opening 41. The needle valve 5| is preferably removed and aplug I20 substituted therefor. The air supply port 91 and the watersupply pipe 93 and associated elements remain identical, and also theshaft 30, valve body 3! and draft actuated element 35. The same leverIDS is attached to the shaft 30. The block 25 is applied to the sameintake'manifold Ill, but the pipe I5 and associated elements is omitted,and a down-draft carburetor I2I, of any well known or preferred type, isemployed with the block 25 arranged between the intake end of themanifold I! and the outlet end of the carburetor I2I, such block beingheld in place by the bolts 26, which extend through the flange I8 and aflange i22 of the carburetor. The lever IDS-is swung upwardly by aretractile coil spring I23. As before stated, the carburetor I 2| ispreferably of the downdraft type and is of any well known or preferredconstruction, the same embodying a choke valve I24, actuated by a crankI25, and a throttle valve I26 actuated by a crank I21.

The operation of the gas saver is as follows:

With the engine at rest and cold, to start the engine, the choke valveI2 is closed and the throttle valve l25 partly opened, the spring I23now holds the draft actuated element 35 and associated elements in theclosed position. When the engine is cranked, the rich mixture is drawninto the cylinders and the engine started. Upon the starting of theengine, there may be a partial opening of the draft actuated element 35or the element may open and close to some extent.

As soon as the engine has started, the choke valve I24 is released andis returned to the opened position, whereby, the suction within theintake moves toward the opened position, port 33 is brought intocommunication with port 99, and theair ladened with moisture passesthrough the port 33 and is drawn into the main passage 28, and is mixedwith the charge from the carburetor. It is thus seen that the devicewill supply an additional amount of air ladened with water to thepreviously formed charge from the carburetor, and the amount ofadditional air thus supplied will be supplied in an increased volumecorresponding to the increase in the speed of the engine. It ispreferred to use the device for supplying air ladened with moisture tothe passage 28, but I contemplate closing off the supply of water andusing the device to supply an additional amount of air only, to thepassage 28.

It is to be understood that the forms of my invention herewith shown anddescribed are to be taken as preferred examples of the same and thatvarious changes in the shape, size and'arrangement of parts may beresorted to without departing from the spirit of the invention or thescope of thesubjoined claims.

Having thus described my invention, what I claim is:

1. In a carburetor, a casing, a throttle valve for controlling thevolume of air entering the casing,-

and a spring to move the draft actuated element in the direction of thedraft;

2. In a carburetor, a casing, a throttle valve for controlling thevolume of air enteringthe casing, a draft actuated element disposed inthe path of travel of the draft passing through the casing, means forintroducing the fuel into the casing inwardly of the throttle valve andoperated by the draft actuated element, a suction operated,

device connected with the draft actuated element and adapted to shiftthe same in an opposite direction to the travel of the draft, andmanually operated means connected with the draft actuated element andadapted to shift the same in a direction in opposition to the suctionoperated device.

3. In a carburetor, a casing, a throttle valve for controlling thevolume of air entering the casing, a movable draft actuated elementdisposed in the path of travel of the draft passing through the casing,means for introducing fuel into the casing inwardly of the throttlevalve and operated by the draft actuated element, a spring to move thedraft actuated element in opposition tor'the action of the draft, andmechanical connecting means between the throttle valve and the draftactuated element so that the draft actuated element may be movedpositively in the direction of the draft by the movement of the throttlevalve.

4. In a carburetor, a casing, a throttle valve for controlling thevolume of air entering the casing, a movable draft actuated elementdisposed in the path of travel of the draft passing through the casing,means for introducing fuel into the casing and operated by the draftactuated element, a spring to move the draft actuated element inopposition to the action of the draft, a lost motion mechanicalconnection between the throttle valve and the draft actuated element andadapted to shift the draft actuated element in the direction of thedraft when the throttle valve is opened and to permit of the movement ofthe draft actuated element in the direction of the draft without movingthe throttle valve, and manually operated means to move the draftactuated element in opposition to the spring.

5. In a carburetor, a casing, a throttle valve to control the entranceof air into thecasing, a block arranged between the outlet end of theeasing and the intake manifold, said block having a main passage incommunication with the interior of the casing, said block having a fuelsupply port, means for mixing air and a liquid fuel and supplying themixture to the port, a pivoted valve body carried by the block anddisposed at the outlet end of the fuel supply port and having a portadapted to be turned into communication with the'fuel supply port, adraft actuated element disposed within the main passage of the block andconnected with the pivoted valve body, and means to move the draftactuated element in opposition to the action of the draft.

6. In a carburetor, a casing, a throttle valve to control the entranceof air into the casing, a

block. arranged beneath the outlet end of the easing, said block havinga main passage in communication with the interior of the casing and alsohaving a fuel supply port, an air inlet for the port, a receptacle tohold a liquid fuel, means of communication between the port and thereceptacle including a tube extending into the receptacle below thelevel of the liquid fuel therein, means for supplying the liquid fuel tothe receptacle, a pivoted valve body having a port to be moved into andout of communication with the first named port, and a draft actuatedelement connected with the pivoted valve body.

*7. In a carburetor, a casing, a throttle valve to control the entranceof air into the casing, a block arranged beneath the outlet end of thecasing, said block having a main passage and a fuel supply port and amoisture supply port, means to supply a fuel to the fuel supply port,means to supply air ladened with water to the moisture supply port, apivoted valve body having a port for coaction with the fuel supply portand a port for coaction with the moisture supply port, and a draftactuated element connected with the valve body.

8. In a carburetor, a casing, means to supply a fluid to the interior ofthe casing including a pivoted valve body, a draft acLuated elementconnected with the pivoted valve body to tu therewith and adapted to beswung in one dir tion by the draft passing through the casing, means tomove the draft actuated element in an opposite direction in oppositionto the draft, a choke lever pivotally connected with the valve body andadapted to swing the draft actuated element in.

the direction of the draft and incapable of being moved by the valvebody when the draft actuated element-is shifted in the direction of thedraft by such draft, and a throttle valve for controlling the volume ofair passing through the casing.

9. In a carburetor, a casing, means to supply fuel to the interior ofthe casing including a pivoted v'alvez body projecting into the bore ofthe casingfa draft actuated element bodily mounted upon the pivotedvalve body to turn therewith and tobe swung in one direction by thedraft passing through the casing, a lever attached to the valve body tomove therewith, means to move the lever ina' direction to swing thedraft act ated element in opposition to the travel of the draft, a chokelever pivoted upon the valve body and having a part to engage with thefirst named leverso that the choke lever may swing the draft actuatedelement in the direction of travel of the draft, and a throttle valvefor controlling the volume of air passing through the casing.

10. In a carburetor, a casing, means to supply a fluid to the interiorof the casing including a pivoted valve body having its axis of turningmovement extending transversely of the bore of the casing, a draftactuated element bodily mounted upon the pivoted valve body to turntherewith and to be swung in a direction longitudinally of the bore ofthe casing and to be moved in one direction by the travel of the draftthrough the casing, automatic means to move the draft actuated elementin an opposite direction in opposition to the direction of travel of thedraft, manually operated means to move the draft actuated element in thedirection of travel of the draft, and a throttle valve to control thevolume of air passing through the casing.

11. In a carburetor, a casing, means to supply fuel to the interior ofthe casing including a pivoted valve body having its axis of turningmovement extending transversely of the longitudinal axis of the bore ofthe casing, a draft actuated element bodily mounted upon the pivotedvalve body to turn with it and arranged within the bore of the casing tobe swung longitudinally of the bore in one direction by the travel ofthe draft through the casing, automatic means to move the draft actuatedelement in an opposite direction in opposition to the action of thedraft, and a throttle valve to control the volume of air passing throughthe casing.

12. In a carburetor, a casing, a throttle valve for controlling theentrance of air into the casing, a draft actuated element disposed inthe path of travel of the draft passing through the casing and adaptedto move to aposition to close the passage through said casing, means forintroducing fuel into the casing inwardly of the throttle valve andoperated by the draft actuated element, a suction operated deviceleading into the casing at a point inwardly of the air controllingthrottle valve and between. the air controlling throttle valve and thedraft actuated element, and means connecting the suction operated devicewith the draft actuated element, such suction operated device sarving tomove the draft actuated element toward its closed position.

13. In a carburetor, a casing, a throttle valve for controlling theentrance of air into the easing, a movable draft actuated elementdisposed in the path of travel of the draft passing through,

) means connected with the air controlling throttle valve and actuatedby the same when the throttle valve is moved toward. the open positionto positively operate the valve element for supplying fuel into thecasing, such positively operating means permitting of the furtheropening operaair controlling throttle valve toward the open position,and manually operated means for actuat-- ing the said valve element forsupplying fuel into the casing while the air controlling throttle valveis substantially, closed.

14. In a carburetor, a. a throttle valve. for controlling the entranceof air into the casing,-amovable draft actuated element disposed in thepath of travel of the draft passing through .tion of the said valveelement without movingthe the casing, means for introducing fuel intothe casing inwardly of the throttle valve and including a valve elementfor controlling the volume of fuel entering the casing, said valveelement being operated by the draft actuated element, means to move thedraft actuated element in opposition to the action of the draft, meansoperated by the air controlling throttle valve when it is moved supplyfuel into the casing without moving the 5 air controlling throttlevalve.

WILLIAM B. PARKER.'

